1. Before calling a service person
Warning messages will be displayed on the monitor if some problems occur. It might be operation errors or
problems of the machine.
In this case, refer the following instructions.
If the function is still not salvaged or recovered, disconnect the power supply and consult the dealer.
a. Message when power ON
Message Cause Remedy
REF/KER CCD CHECK...
Internal error
Turn OFF the power switch and turn
ON again after 10 seconds
If the message appears again,
consult the dealer
REF MOTOR ORIGIN... FAILED
INVALID SETUP DATA - REF
Internal setup data for refractometry
is invalid
Consult the dealer
INVALID SETUP DATA - KER
Internal setup data for keratometry
is invalid
Consult the dealer
b. Message on measuring
Message Cause Remedy
ERROR
Alignment is improper
Measure after aligning the pupil and the
alignment mark properly
Eyelid or eyelashes are covering the
pupil
Instruct the examinee to open his or her eyes
wide, or lift up the eyelid lightly with your fingers
and measure again
When the pupil is smaller than the outer
alignment mark
The minimum pupil diameter that can be
measured is 2.0 mm. Although it is possible to
measure in the bright place, don't expose
examinee's eyes to the direct sunlight or too
bright indoor lights to prevent the contraction of
the pupil
When the examinee has some illness like
cataract
Observe the eye in REF mode. If cataract is not
severe, measurement can be performed in the
LiveREF mode
Examinee has intraocular lens
implanted.
Measure in the LiveREF mode
When the mire image is odd shaped
because of tears
Instruct the examinee to open and close his or
her eyes several times and measure again
When the mire image is not clear
because the cornea is dry
Instruct the examinee to open and close his or
her eyes several times and measure again
Examinee has strong irregular
astigmatism or corneal disease
Impossible to measure
+ OUT
Sum of SPH and CYL of examinee's eye
is over +22D
Impossible to measure
Radius of curvature is over 10.2 mm
Objective glass in the measurement
window is dirty
Clean the glass
USER MANUAL > SELF INSPECTION AND MAINTENANCE
51 AKR300 - Auto Kerato Refractometer > V3 - 04-2020
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